2013 Subaru BRZ 6 speed manual Gear Ratios Calculator, MPH, Top Speed

This calculator outputs the how fast the Subaru BRZ can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size(345/30/20)

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OR

Tire Diameter(inches)

Final Drive Ratio

Redline (RPM)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

500

2.46

4.08

5.8

7.38

8.93

11.6

0

0

600

2.95

4.89

6.96

8.86

10.72

13.92

0

0

700

3.44

5.71

8.12

10.33

12.5

16.24

0

0

800

3.94

6.53

9.28

11.81

14.29

18.56

0

0

900

4.43

7.34

10.44

13.29

16.08

20.88

0

0

1000

4.92

8.16

11.6

14.76

17.86

23.2

0

0

1100

5.41

8.97

12.76

16.24

19.65

25.52

0

0

1200

5.91

9.79

13.92

17.72

21.44

27.84

0

0

1300

6.4

10.6

15.08

19.19

23.22

30.16

0

0

1400

6.89

11.42

16.24

20.67

25.01

32.48

0

0

1500

7.38

12.23

17.4

22.14

26.79

34.8

0

0

1600

7.87

13.05

18.56

23.62

28.58

37.12

0

0

1700

8.37

13.87

19.72

25.1

30.37

39.44

0

0

1800

8.86

14.68

20.88

26.57

32.15

41.76

0

0

1900

9.35

15.5

22.04

28.05

33.94

44.08

0

0

2000

9.84

16.31

23.2

29.53

35.73

46.4

0

0

2100

10.33

17.13

24.36

31

37.51

48.72

0

0

2200

10.83

17.94

25.52

32.48

39.3

51.04

0

0

2300

11.32

18.76

26.68

33.95

41.09

53.36

0

0

2400

11.81

19.58

27.84

35.43

42.87

55.68

0

0

2500

12.3

20.39

29

36.91

44.66

58

0

0

2600

12.79

21.21

30.16

38.38

46.44

60.32

0

0

2700

13.29

22.02

31.32

39.86

48.23

62.64

0

0

2800

13.78

22.84

32.48

41.34

50.02

64.96

0

0

2900

14.27

23.65

33.64

42.81

51.8

67.28

0

0

3000

14.76

24.47

34.8

44.29

53.59

69.6

0

0

3100

15.25

25.29

35.96

45.76

55.38

71.92

0

0

3200

15.75

26.1

37.12

47.24

57.16

74.24

0

0

3300

16.24

26.92

38.28

48.72

58.95

76.56

0

0

3400

16.73

27.73

39.44

50.19

60.73

78.88

0

0

3500

17.22

28.55

40.6

51.67

62.52

81.2

0

0

3600

17.72

29.36

41.76

53.15

64.31

83.52

0

0

3700

18.21

30.18

42.92

54.62

66.09

85.84

0

0

3800

18.7

31

44.08

56.1

67.88

88.16

0

0

3900

19.19

31.81

45.24

57.58

69.67

90.48

0

0

4000

19.68

32.63

46.4

59.05

71.45

92.8

0

0

4100

20.18

33.44

47.56

60.53

73.24

95.12

0

0

4200

20.67

34.26

48.72

62

75.03

97.44

0

0

4300

21.16

35.07

49.88

63.48

76.81

99.75

0

0

4400

21.65

35.89

51.04

64.96

78.6

102.07

0

0

4500

22.14

36.7

52.2

66.43

80.38

104.39

0

0

4600

22.64

37.52

53.36

67.91

82.17

106.71

0

0

4700

23.13

38.34

54.52

69.39

83.96

109.03

0

0

4800

23.62

39.15

55.68

70.86

85.74

111.35

0

0

4900

24.11

39.97

56.84

72.34

87.53

113.67

0

0

5000

24.6

40.78

58

73.81

89.32

115.99

0

0

5100

25.1

41.6

59.16

75.29

91.1

118.31

0

0

5200

25.59

42.41

60.32

76.77

92.89

120.63

0

0

5300

26.08

43.23

61.48

78.24

94.67

122.95

0

0

5400

26.57

44.05

62.64

79.72

96.46

125.27

0

0

5500

27.07

44.86

63.8

81.2

98.25

127.59

0

0

5600

27.56

45.68

64.96

82.67

100.03

129.91

0

0

5700

28.05

46.49

66.12

84.15

101.82

132.23

0

0

5800

28.54

47.31

67.28

85.62

103.61

134.55

0

0

5900

29.03

48.12

68.44

87.1

105.39

136.87

0

0

6000

29.53

48.94

69.6

88.58

107.18

139.19

0

0

6100

30.02

49.76

70.76

90.05

108.96

141.51

0

0

6200

30.51

50.57

71.92

91.53

110.75

143.83

0

0

6300

31

51.39

73.08

93.01

112.54

146.15

0

0

6400

31.49

52.2

74.24

94.48

114.32

148.47

0

0

6500

31.99

53.02

75.4

95.96

116.11

150.79

0

0

6600

32.48

53.83

76.56

97.44

117.9

153.11

0

0

6700

32.97

54.65

77.72

98.91

119.68

155.43

0

0

6800

33.46

55.47

78.88

100.39

121.47

157.75

0

0

6900

33.95

56.28

80.04

101.86

123.26

160.07

0

0

7000

34.45

57.1

81.2

103.34

125.04

162.39

0

0

7100

34.94

57.91

82.36

104.82

126.83

164.71

0

0

7200

35.43

58.73

83.52

106.29

128.61

167.03

0

0

7300

35.92

59.54

84.68

107.77

130.4

169.35

0

0

7400

36.42

60.36

85.84

109.25

132.19

171.67

0

0

7500

36.91

61.17

87

110.72

133.97

173.99

0

0

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.